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Toshiba 40L2200u screen goes black after one hour

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    Toshiba 40L2200u screen goes black after one hour

    Toshiba 40L2200u works perfect for about an hour then the screen goes black , green light stays on and I get audio.
    This must be a common problem , I have seen it before.
    I do have a working one that I can borrow parts from ,any ideas?

    Thanks

    #2
    Re: Toshiba 40L2200u screen goes black after one hour

    Does the bl_on drop out when the screen goes black?
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

    Comment


      #3
      Re: Toshiba 40L2200u screen goes black after one hour

      Originally posted by budm View Post
      Does the bl_on drop out when the screen goes black?
      What do you mean by that?

      Comment


        #4
        Re: Toshiba 40L2200u screen goes black after one hour

        You need to find out the if the BL_ON command from the main board is still present when the backlights go off. Please read the basic LCD TV-MONITOR troubleshooting guide.
        Do you have tools?
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment


          #5
          Re: Toshiba 40L2200u screen goes black after one hour

          Originally posted by budm View Post
          You need to find out the if the BL_ON command from the main board is still present when the backlights go off. Please read the basic LCD TV-MONITOR troubleshooting guide.
          Do you have tools?
          I did read your guide , I have a working same model tv. should I switch the tcon or the main board to trouble shoot

          thanks

          Comment


            #6
            Re: Toshiba 40L2200u screen goes black after one hour

            If you do have same board, then try one board at a time, I would start with the main board.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment


              #7
              Re: Toshiba 40L2200u screen goes black after one hour

              ok thanks

              Comment


                #8
                Re: Toshiba 40L2200u screen goes black after one hour

                I have the same model # tv 40L2200U that it works sometimes ok but sometime got theme you still can see the manu & picture but really theme .. There is something the i can do to fixed

                Comment


                  #9
                  Re: Toshiba 40L2200u screen goes black after one hour

                  Originally posted by ransome View Post
                  I did read your guide , I have a working same model tv. should I switch the tcon or the main board to trouble shoot

                  thanks
                  Hi, have you found out what is wrong? I have the same TV with the same problem.

                  Comment

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